This has been a fantastic motor running on 4S in my Serpent 811-Be. Plenty of power, very smooth startup, no heat problems. I really like the built-in bullet connectors, don't need to get the soldering iron out every time I want to remove the motor. I was a little hesitant to try this motor as LRP's first try at 1/8th motors (the Vector 8 series) fell short. After running the Dynamic 8 I can say LRP definitely got it right this time, a true 4-pole 1/8th motor that can hold it's own against any of the other big names in 1/8th electric.